The importance of spillway design and to investigate its properties using experimentation

Salami, Elijah Olatunbosun (2015) The importance of spillway design and to investigate its properties using experimentation. BEng dissertation, University of Portsmouth.

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    Abstract

    A spillways main function is to pass down excess water from the reservoir, into the downstream river. The purpose of the study was to research into the importance of spillway design, by considering how vital a role spillways partake into to the current increasing trends of flooding in the UK. The objectives where to: evaluate the relationship of height and flow that passed over a spillway, to discover the attributes and the different types of spillways, to compare the relationship of height and flow that passed over a spillway when in a 73mm flume compared to a 300 mm flume, to evaluate the effect energy dissipation had on the height and flow relationship that passed over a spillway and finally to evaluate the effect of varying the tailwater (downstream) water level. The experiments that where conducted, where to gain extensive knowledge of the relationship of the height and flow that passed over a spillway. There was also a consideration of the attributes of spillways, such as energy dissipation and to attempt to gain more information regarding the current gap of knowledge, regarding the effect of varying the tailwater (downstream water flow) at the end of the flumes. There were two different flumes used during the experimental phases of the study. These where the S6MK11 tilting flume (300mm) and the MK11 multipurpose flume (73mm). The main scope of the experiments conducted, were to measure the upstream and tailwater heights for the corresponding flow that passed over the spillway. Interpreting the results lead to a few conclusions. The spillway equation governs the relationship between the upstream and tailwater height and the corresponding flow that passed over a spillway. Energy Dissipators actively reduce the kinetic energy of the flow that passes over a spillway. This generally led to smaller heights at the tailwater end. No new data was found for the current gap in knowledge, however a few suggestions were implied in this study to help improve the research methods regarding the current gap in knowledge. There was a limitation on the variety of spillways used, as only a simple chute were used for the experiments.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Jane Polwin
    Date Deposited: 21 Oct 2015 16:12
    Last Modified: 21 Oct 2015 16:12
    URI: http://eprints.port.ac.uk/id/eprint/18578

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